Heard today from a co-worker who had built a twin turbo C-36.  Guy that bought it blew it up.   

 Apparantly he was tweaking the boost  past the 12 PSI it was tuned to run at.  Said it bent two rods!  At 12 PSI it was dyno'ed at 440hp, probably was over 500hp when it blew.  Really has me thinking hard about those titanium rods. That's one expensive insurance policy 
